The dog has been vaccinated. What method can be used to detect whether dogs produce antibodies?

This can't be detected. Even vaccinated dogs may get sick, but the chances are not great.

As long as it is a regular hospital, most antibodies can be injected successfully.

So don't touch strange puppies. You have injected the first five rings. If there is a virus, it will trigger and produce symptoms, but your dog has finished all the vaccines, which means it is healthy now.

Sorry, I asked you this morning. There is a method to detect antibodies, which is called antibody drop test. Special instruments are needed to detect antibodies. I suggest you go to a large pet hospital. The antibody detection of immunized dogs was the lowest, which was 1: 32. You can take the dog to do it. It's good.